If you were in a smooth-riding train with no windows, could you sense the difference between uniform motion and rest? Between accelerated motion and rest? How could you make such a distinction with a bowl filled with water?
I think this question is an easy one if you think about it.
AND you should post some insight into what you think about the question, not just post a series of questions with no effort. (this will get you nowhere)
anyhow, as for the water in the bowl.
If you have ever drank something while riding in a vehicle, what happened to the liquid in the cup when the car went foward? And if it stopped,what happened to the liquid then? (meaning which direction did it shift)
This will help you and if you post your thoughts based on what I said
someone or me can help.